#include <iostream>
#include <cstdio>
using namespace std;


int main()
{
	const long double PI = 3.14159;
	long double r, d, C, S = 0;
	cin >> r;
	d = r * 2;
	C = 2 * PI * r;
	S = PI * r * r;
	printf("%.4Lf %.4Lf %.4Lf", d, C, S);
	return 0;
}
